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Heavy Hadron Chiral Perturbation Theory
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abstract
The formalism and applications of chiral perturbation theory for hadrons containing a single heavy quark are discussed. We emphasize the utility of working directly with the velocity dependent ``super'' fields which appear in the chiral Lagrangian and whose interactions manifestly preserve heavy quark spin symmetry rather than their individual spin components. Chiral logarithm corrections to meson and baryon Isgur-Wise functions are found using these fields. We also identify a unique dimension-five operator which couples the axial vector Goldstone current to the heavy antitriplet baryon field $T_\Q$. We then compute the differential rate for the spin symmetry violating decay $T_b(v) \to T_c(v') \ell \bar{\v}_\ell \pi$. The ratio of this decay rate to that for the corresponding pure semileptonic transition can be studied away from the zero recoil point.
Forward citations
Cited by 3 Pith papers
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A Phenomenological Model of Mesons for Charged Current Weak Decays
A symmetry-guided phenomenological model organizes leading current-current operators for charged-current decays of heavy-light mesons and reproduces heavy-quark scaling relations for decay constants and form factors.
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Radiative Semileptonic Decays of Beautiful Hadrons
Within HQET, radiative semileptonic decay form factors for Lambda(b) to Lambda(c) and B to D(*) transitions are fully determined by non-radiative Isgur-Wise functions and heavy-hadron magnetic dipole moments in soft a...
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Radially Excited Bottom Mesons in Heavy Quark Effective Theory
HQET flavor symmetry is used to predict n=3 bottom and bottom-strange meson masses, their strong decay widths in terms of couplings, coupling upper bounds, and n=4 Regge extrapolations.
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